Pappas P W, Marschall E A, Morrison S E, Durka G M, Daniel C S
Department of Zoology, Ohio State University, Columbus 43219-1293, USA.
Int J Parasitol. 1995 Oct;25(10):1179-84. doi: 10.1016/0020-7519(95)00051-3.
When provided with fecal pellets from uninfected (control) rats and rats infected with the tapeworm Hymenolepis diminuta, more fed and starved (72 h) female and starved male Tenebrio molitor fed on fecal pellets from infected- than from control rats; compared to fecal pellets from controls rats, fed males avoided the infective fecal pellets. Uninfective and infective fecal pellets had similar moisture contents, so increased coprophagic activity was not due to differences in moisture content. Fed and starved males and females were fed on fecal pellets containing tapeworm eggs and examined for cysticercoids. Significantly greater numbers of starved beetles than fed beetles were infected with cysticercoids, but the numbers of infected males and females within each treatment were not significantly different. On the other hand, males contained significantly greater numbers of cysticercoids than did females, and there was no significant difference between the numbers of cysticercoids recovered from fed and starved beetles. The data support the hypothesis that the feeding behavior of T. molitor on rat feces is altered by the presence of tapeworm eggs. The data demonstrated further that transmission dynamics are affected by a complex interaction of the beetle's sex and nutritional status.
当给黄粉虫提供来自未感染（对照）大鼠和感染微小膜壳绦虫的大鼠的粪便颗粒时，更多喂食和饥饿（72小时）的雌性以及饥饿的雄性黄粉虫以感染组大鼠的粪便颗粒为食的情况多于对照组；与对照组大鼠的粪便颗粒相比，已喂食的雄性避开了感染性粪便颗粒。未感染和感染性粪便颗粒的水分含量相似，因此粪便摄食活动增加并非由于水分含量差异所致。给已喂食和饥饿的雄性及雌性喂食含有绦虫卵的粪便颗粒，并检查是否有似囊尾蚴。感染似囊尾蚴的饥饿甲虫数量显著多于已喂食的甲虫，但各处理组中感染的雄性和雌性数量无显著差异。另一方面，雄性体内的似囊尾蚴数量显著多于雌性，且从已喂食和饥饿甲虫中回收的似囊尾蚴数量无显著差异。数据支持这样的假设，即绦虫卵的存在改变了黄粉虫对大鼠粪便的摄食行为。数据进一步表明，传播动态受到甲虫性别和营养状况复杂相互作用的影响。
